using System;
using iTextSharp.text.error_messages;

/*
 * This file is part of the iText project.
 * Copyright (c) 1998-2009 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * you must retain the producer line in every PDF that is created or manipulated
 * using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
namespace iTextSharp.text.pdf {

    /** Implements the shading pattern dictionary.
     *
     * @author Paulo Soares
     */
    public class PdfShadingPattern : PdfDictionary {

        protected PdfShading shading;
    
        protected PdfWriter writer;
    
        protected float[] matrix = {1, 0, 0, 1, 0, 0};
    
        protected PdfName patternName;

        protected PdfIndirectReference patternReference;

        /** Creates new PdfShadingPattern */
        public PdfShadingPattern(PdfShading shading) {
            writer = shading.Writer;
            Put(PdfName.PATTERNTYPE, new PdfNumber(2));
            this.shading = shading;
        }
        
        internal PdfName PatternName {
            get {
                return patternName;
            }
        }

        internal PdfName ShadingName {
            get {
                return shading.ShadingName;
            }
        }
    
        internal PdfIndirectReference PatternReference {
            get {
                if (patternReference == null)
                    patternReference = writer.PdfIndirectReference;
                return patternReference;
            }
        }
    
        internal PdfIndirectReference ShadingReference {
            get {
                return shading.ShadingReference;
            }
        }
    
        internal int Name {
            set {
                patternName = new PdfName("P" + value);
            }
        }
    
        internal void AddToBody() {
            Put(PdfName.SHADING, ShadingReference);
            Put(PdfName.MATRIX, new PdfArray(matrix));
            writer.AddToBody(this, PatternReference);
        }
    
        public float[] Matrix {
            get {
                return matrix;
            }

            set {
                if (value.Length != 6)
                    throw new Exception(MessageLocalization.GetComposedMessage("the.matrix.size.must.be.6"));
                this.matrix = value;
            }
        }
    
        public PdfShading Shading {
            get {
                return shading;
            }
        }
    
        internal ColorDetails ColorDetails {
            get {
                return shading.ColorDetails;
            }
        }

    }
}
